In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users mu

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In Order To Estimate The Mean Amount Of Time Computer Users Spend On The Internet Each Month How Many Computer Users Mu 1 (46.84 KiB) Viewed 167 times

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In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 90% confident that your sample mean is within 13 minutes of the population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 217 min. What is a major obstacle to getting a good estimate of the population mean? Use technology to find the estimated minimum required sample size. The minimum sample size required is computer users (Round up to the nearest whole number.) What is a major obstacle to getting a good estimate of the population mean? O A. There may not be 754 computer users to survey B. The data does not provide information on what the computer users did while on the internet. O c. it is difficult to precisely measure the amount of time spent on the internet, invalidating some data values OD. There are no obstacles to getting a good esitmate of the population mean.
Randomly selected students participated in an experifnent to test their ability to determine when one minute (or sixty seconds) has passed. Forty students yielded a sample mean of 58.7 seconds. Assuming that o = 11.3 seconds, construct and interpret a 99% confidence interval estimate of the population mean of all students. Click here to view at distribution table Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. What is the 99% confidence interval for the population mean? S (Type integers or decimals rounded to one decimal place as needed.) Based on the result, is it likely that the students' estimates have a mean that is reasonably close to sixty seconds? A. Yes, because the confidence interval includes sixty seconds. B. Yes, because the confidence interval does not include sixty seconds. C. No, because the confidence interval includes sixty seconds. D. No, because the confidence interval does not include sixty seconds. et: ОО
es A simple random sample from a population with a normal distribution of 100 body temperatures has X = 99.10°F and s= 0.62°F. Construct a 95% confidence interval estimate of the standard deviation of body temperature of all healthy humans. Is it safe to conclude that the population standard deviation is less than 1.50°F? Click the icon to view the table of Chi-Square critical values plac [°F<o<°F (Round to two decimal places as needed.) Is it safe to conclude that the population standard deviation is less than 1.50°F? sug Intel A. This conclusion is not safe because 1.50°F is outside the confidence interval. OB. This conclusion is safe because 1.50°F is in the confidence interval. OC. This conclusion is not safe because 1.50°F is in the confidence interval. OD. This conclusion is safe because 1.50°F is outside the confidence interval. etsu